I pulled the trigger and purchased a sapphire silver/blue SRT-6. Only $760 more then my 2006 limited.

I got a great deal on my 06' (lucky me and Thank-You FP) so the difference was minimal (I only had the 06' for two months) and far less then any performance upgrade.

I say pull the trigger now - every minute you wait the new SRT-6's will be gone and the value on your '04 will be less.